Conjoined tomatoes

Hi Everyone! It's my first year growing tomatoes and I have three Berkeley Tie Dye plants. Virtually all of the fruit on them looks like it is "conjoined." IE, 2 or 3 tomatoes smushed into one. Based on initial googling I think this "fasciation" but if so it seems odd that every fruit on every plant would be affected. I do know that I am growing them too close together but would that cause this?

Any thoughts on what is causing this would be greatly appreciated! Attaching some photos.